Explosive-engine crank-casing.



No. 781,064 PATENTED JAN. 3l, 1905. E. R. HEWITT.

EXPLOSIVE ENGINE CRANK CASING.

APPLICATION FILED MAR. 23, 1904.

EDWARD R. HENITT,

Patented January 31, 1905.

PATENT OFFICE.

OF NElV YORK, N. Y.

EXPLOSIVE-ENGlNE CRANK-CASING.

SPECIFICATION forming part of Letters Patent No. 781,064, dated January 31, 1905.

SerialN0.199,65'7.

To all whrmt it may concern:

Be it known that I, EDWARD R. HEWITT, citizen of the United States, residing at the city of New York, in the borough of Manhattan and State of New York, have invented certain new and useful Improvements in Ex plosive-Engine Crank-Casings, of which the following is a full, clear, and exact description.

This invention relates to improvements in engine crank-cases and in other apparatus used in connection with explosion-engines, the object in view being to assemble a crankcasing, an electric-generator casing, and a tank for lubricating material into a compact structure in such relative positions to each other and to the engine with which they are connected that certain advantages to be hereinafter enumerated will be obtained.

A further object of the invention is a provision of means for lubricatlng the crank-shaft bearings from the free oil in the bottom of the crank-shaft casing.

The invention consists of the constructions and combinations hereinafter particularly described, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a perspective view of the complete structure. Fig. 2 is a plan of a portion of the lower half of the structure, showing the electric generator in position and the manner in which it is driven. Fig. 3 is a vertical section through the upper part of the crank-casing, showing certain lubricating devices.

The essential idea of the invention is to assemble into a compact structure all the various casings, covers, or receptacles.

A indicates that portion of the structure known as the crank-casing.

B is the tank for lubricating material.

C is the casing for the electric generator, and D is the casing for the cam-shaft which operates the valves of the engine.

The crank-casing is of diamond shape in longitudinal section, the main shaft-bearings being at the center of the widest part of the casing, as indicated at a. One of the inclines forming the top or root of this casing at the same time forms the bottom of the oil-tank B, as indicated by the dotted line a, while the other incline may have a cover-plate (t affording access to the interior of the crank-casing. The oil-tank is an integral formation on top of the crank-casing, it being provided with a filling-opening at b and with a recess Z) for the accommodation and protection of a gageglass to show the quantity of oil in the tank. The cylinder of the engine is supposed to be bolted to the end of the casing A. a portion of the rim to which the cylinder is to be fastened being shown at (1 The casing C for the electric generator is also cast integral with the casing A. It is made of a shape to closely conform to that of the generator itself, which, as shown in Fig. 2 at e, is located therein. The shaft (2 of the generator projects into the interior of the crank-casing and carries a pinion which is driven by a gear 0 on the main shaft S. The casing D is merely a cylindri ral integral projection from the side of the casing A to accommodate a shaft which also extends into the interior of the crank-casing and is geared to the wheel a or another for the purpose of operating the valves of the engine, these valves being controlled by rods which lead into the side of the casing D.

This whole structure is made in two parts joined along the line f, portions of the casings A, O, and D being in each part, while the entire casing B is in one of the parts. This method of construction brings the several parts into close relation to each other for compactness. It protects the electric generator from injury, and it subjects the oil-tank to the heat of the engine, which is transmitted through the integral walls of the casing and tank to the oil, thereby maintaining the oil in a highly-fluid condition, so that it will flow easily to the various points to be lubricated.

The interior of the crank-casing usually contains a certain amount of free oil, which collects at the bottom and through which the crank on shaft S dashes at each rotation, taking up the oil and throwing it to various parts of the casing and into the engine-cylinder. To provide that a portion of this flying oil may reach the, main bearings of the crankshaft, 1 form integrally with the upper part of the casing four gutters or shelves. Two of these extend across the two inclined roofsections of the casing, as indicated at 71, and connect with supplemental inclined shelves or gutters, one of which is shown at '11, the latter gutters being attached to the side walls of the casing and leading downward to holes i communicating with the bearings. The oil thrown against the roof of the casing above the shelves or gutters is caught by the latter and conducted to the bearings. The shelf 6 on one side is necessarily formed upon the cover-plate (0 Having described my invention, I claim 1. A two-part casting forming a casing, one part thereof forming the cover, having a compartment for a shaft and having a separate compartment for a generator.

2. A crank-shaft casing made in a plurality l l l l of parts, one part forming the cover, having ED'WARD R. HEVVITII Witnesses:

FRANK S. OBER, IVALDO M. (JIIAPIN. 

